* structures.
*/
-#include <linux/config.h>
#include <linux/types.h>
#include <linux/ipv6.h>
#include <linux/in6.h>
/* This is where we call the helper: as the packet goes out. */
ct = nf_ct_get(*pskb, &ctinfo);
- if (!ct)
+ if (!ct || ctinfo == IP_CT_RELATED + IP_CT_IS_REPLY)
goto out;
help = nfct_help(ct);
return ipv6_conntrack_in(hooknum, pskb, in, out, okfn);
}
-/* Connection tracking may drop packets, but never alters them, so
- make it the first hook. */
-static struct nf_hook_ops ipv6_conntrack_defrag_ops = {
- .hook = ipv6_defrag,
- .owner = THIS_MODULE,
- .pf = PF_INET6,
- .hooknum = NF_IP6_PRE_ROUTING,
- .priority = NF_IP6_PRI_CONNTRACK_DEFRAG,
-};
-
-static struct nf_hook_ops ipv6_conntrack_in_ops = {
- .hook = ipv6_conntrack_in,
- .owner = THIS_MODULE,
- .pf = PF_INET6,
- .hooknum = NF_IP6_PRE_ROUTING,
- .priority = NF_IP6_PRI_CONNTRACK,
-};
-
-static struct nf_hook_ops ipv6_conntrack_local_out_ops = {
- .hook = ipv6_conntrack_local,
- .owner = THIS_MODULE,
- .pf = PF_INET6,
- .hooknum = NF_IP6_LOCAL_OUT,
- .priority = NF_IP6_PRI_CONNTRACK,
-};
-
-static struct nf_hook_ops ipv6_conntrack_defrag_local_out_ops = {
- .hook = ipv6_defrag,
- .owner = THIS_MODULE,
- .pf = PF_INET6,
- .hooknum = NF_IP6_LOCAL_OUT,
- .priority = NF_IP6_PRI_CONNTRACK_DEFRAG,
-};
-
-/* Refragmenter; last chance. */
-static struct nf_hook_ops ipv6_conntrack_out_ops = {
- .hook = ipv6_confirm,
- .owner = THIS_MODULE,
- .pf = PF_INET6,
- .hooknum = NF_IP6_POST_ROUTING,
- .priority = NF_IP6_PRI_LAST,
-};
-
-static struct nf_hook_ops ipv6_conntrack_local_in_ops = {
- .hook = ipv6_confirm,
- .owner = THIS_MODULE,
- .pf = PF_INET6,
- .hooknum = NF_IP6_LOCAL_IN,
- .priority = NF_IP6_PRI_LAST-1,
+static struct nf_hook_ops ipv6_conntrack_ops[] = {
+ {
+ .hook = ipv6_defrag,
+ .owner = THIS_MODULE,
+ .pf = PF_INET6,
+ .hooknum = NF_IP6_PRE_ROUTING,
+ .priority = NF_IP6_PRI_CONNTRACK_DEFRAG,
+ },
+ {
+ .hook = ipv6_conntrack_in,
+ .owner = THIS_MODULE,
+ .pf = PF_INET6,
+ .hooknum = NF_IP6_PRE_ROUTING,
+ .priority = NF_IP6_PRI_CONNTRACK,
+ },
+ {
+ .hook = ipv6_conntrack_local,
+ .owner = THIS_MODULE,
+ .pf = PF_INET6,
+ .hooknum = NF_IP6_LOCAL_OUT,
+ .priority = NF_IP6_PRI_CONNTRACK,
+ },
+ {
+ .hook = ipv6_defrag,
+ .owner = THIS_MODULE,
+ .pf = PF_INET6,
+ .hooknum = NF_IP6_LOCAL_OUT,
+ .priority = NF_IP6_PRI_CONNTRACK_DEFRAG,
+ },
+ {
+ .hook = ipv6_confirm,
+ .owner = THIS_MODULE,
+ .pf = PF_INET6,
+ .hooknum = NF_IP6_POST_ROUTING,
+ .priority = NF_IP6_PRI_LAST,
+ },
+ {
+ .hook = ipv6_confirm,
+ .owner = THIS_MODULE,
+ .pf = PF_INET6,
+ .hooknum = NF_IP6_LOCAL_IN,
+ .priority = NF_IP6_PRI_LAST-1,
+ },
};
#ifdef CONFIG_SYSCTL
extern struct nf_conntrack_protocol nf_conntrack_protocol_icmpv6;
extern int nf_ct_frag6_init(void);
extern void nf_ct_frag6_cleanup(void);
-static int init_or_cleanup(int init)
+
+MODULE_ALIAS("nf_conntrack-" __stringify(AF_INET6));
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Yasuyuki KOZAKAI @USAGI <yasuyuki.kozakai@toshiba.co.jp>");
+
+static int __init nf_conntrack_l3proto_ipv6_init(void)
{
int ret = 0;
- if (!init) goto cleanup;
+ need_conntrack();
ret = nf_ct_frag6_init();
if (ret < 0) {
printk("nf_conntrack_ipv6: can't initialize frag6.\n");
- goto cleanup_nothing;
+ return ret;
}
ret = nf_conntrack_protocol_register(&nf_conntrack_protocol_tcp6);
if (ret < 0) {
goto cleanup_icmpv6;
}
- ret = nf_register_hook(&ipv6_conntrack_defrag_ops);
+ ret = nf_register_hooks(ipv6_conntrack_ops,
+ ARRAY_SIZE(ipv6_conntrack_ops));
if (ret < 0) {
printk("nf_conntrack_ipv6: can't register pre-routing defrag "
"hook.\n");
goto cleanup_ipv6;
}
-
- ret = nf_register_hook(&ipv6_conntrack_defrag_local_out_ops);
- if (ret < 0) {
- printk("nf_conntrack_ipv6: can't register local_out defrag "
- "hook.\n");
- goto cleanup_defragops;
- }
-
- ret = nf_register_hook(&ipv6_conntrack_in_ops);
- if (ret < 0) {
- printk("nf_conntrack_ipv6: can't register pre-routing hook.\n");
- goto cleanup_defraglocalops;
- }
-
- ret = nf_register_hook(&ipv6_conntrack_local_out_ops);
- if (ret < 0) {
- printk("nf_conntrack_ipv6: can't register local out hook.\n");
- goto cleanup_inops;
- }
-
- ret = nf_register_hook(&ipv6_conntrack_out_ops);
- if (ret < 0) {
- printk("nf_conntrack_ipv6: can't register post-routing hook.\n");
- goto cleanup_inandlocalops;
- }
-
- ret = nf_register_hook(&ipv6_conntrack_local_in_ops);
- if (ret < 0) {
- printk("nf_conntrack_ipv6: can't register local in hook.\n");
- goto cleanup_inoutandlocalops;
- }
-
#ifdef CONFIG_SYSCTL
nf_ct_ipv6_sysctl_header = register_sysctl_table(nf_ct_net_table, 0);
if (nf_ct_ipv6_sysctl_header == NULL) {
printk("nf_conntrack: can't register to sysctl.\n");
ret = -ENOMEM;
- goto cleanup_localinops;
+ goto cleanup_hooks;
}
#endif
return ret;
- cleanup:
- synchronize_net();
#ifdef CONFIG_SYSCTL
- unregister_sysctl_table(nf_ct_ipv6_sysctl_header);
- cleanup_localinops:
+ cleanup_hooks:
+ nf_unregister_hooks(ipv6_conntrack_ops, ARRAY_SIZE(ipv6_conntrack_ops));
#endif
- nf_unregister_hook(&ipv6_conntrack_local_in_ops);
- cleanup_inoutandlocalops:
- nf_unregister_hook(&ipv6_conntrack_out_ops);
- cleanup_inandlocalops:
- nf_unregister_hook(&ipv6_conntrack_local_out_ops);
- cleanup_inops:
- nf_unregister_hook(&ipv6_conntrack_in_ops);
- cleanup_defraglocalops:
- nf_unregister_hook(&ipv6_conntrack_defrag_local_out_ops);
- cleanup_defragops:
- nf_unregister_hook(&ipv6_conntrack_defrag_ops);
cleanup_ipv6:
nf_conntrack_l3proto_unregister(&nf_conntrack_l3proto_ipv6);
cleanup_icmpv6:
nf_conntrack_protocol_unregister(&nf_conntrack_protocol_tcp6);
cleanup_frag6:
nf_ct_frag6_cleanup();
- cleanup_nothing:
return ret;
}
-MODULE_ALIAS("nf_conntrack-" __stringify(AF_INET6));
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Yasuyuki KOZAKAI @USAGI <yasuyuki.kozakai@toshiba.co.jp>");
-
-static int __init nf_conntrack_l3proto_ipv6_init(void)
-{
- need_conntrack();
- return init_or_cleanup(1);
-}
-
static void __exit nf_conntrack_l3proto_ipv6_fini(void)
{
- init_or_cleanup(0);
+ synchronize_net();
+#ifdef CONFIG_SYSCTL
+ unregister_sysctl_table(nf_ct_ipv6_sysctl_header);
+#endif
+ nf_unregister_hooks(ipv6_conntrack_ops, ARRAY_SIZE(ipv6_conntrack_ops));
+ nf_conntrack_l3proto_unregister(&nf_conntrack_l3proto_ipv6);
+ nf_conntrack_protocol_unregister(&nf_conntrack_protocol_icmpv6);
+ nf_conntrack_protocol_unregister(&nf_conntrack_protocol_udp6);
+ nf_conntrack_protocol_unregister(&nf_conntrack_protocol_tcp6);
+ nf_ct_frag6_cleanup();
}
module_init(nf_conntrack_l3proto_ipv6_init);
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